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clk: qcom: clk-debug: Fix possible NULL dereference in _mux_get_parent

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Fix possible NULL dereference in retrieving clk parent name.

Change-Id: Ic4dbc6632f00365ea127042c0f3bd9b66a243ec6
Signed-off-by: Vivek Aknurwar <viveka@codeaurora.org>
This commit is contained in:
Vivek Aknurwar 2020-05-29 18:14:38 -07:00
commit bc47796178
1 changed files with 5 additions and 1 deletions
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6
drivers/clk/qcom/clk-debug.c
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@ -146,13 +146,17 @@ static u8 clk_debug_mux_get_parent(struct clk_hw *hw)
{
int i, num_parents = clk_hw_get_num_parents(hw);
struct clk_hw *hw_clk = clk_hw_get_parent(hw);
struct clk_hw *clk_parent;
const char *parent;
if (!hw_clk)
return 0;
for (i = 0; i < num_parents; i++) {
parent = clk_hw_get_name(clk_hw_get_parent_by_index(hw, i));
clk_parent = clk_hw_get_parent_by_index(hw, i);
if (!clk_parent)
return 0;
parent = clk_hw_get_name(clk_parent);
if (!strcmp(parent, clk_hw_get_name(hw_clk))) {
pr_debug("%s: clock parent - %s, index %d\n", __func__,
parent, i);